Really brings down Phosphate levelsBy Chrison 7/15/2013

Chris would recommend this product to a friend

Before I bought my GFO reactor I had a terrible problem with nuisance algae, especially hair. A few of the CUC ate it but it was growing too fast for them to keep up with, even when reducing the lights to only about an hour a day.

I'm amazed at the difference the BRS GFO made once I started running it. It has completely controllled the phosphate levels in my tank from on average 14ppm down to 0.0ppm and no nuisance algae. It's reduced it so much that I now how to supplement nori for the algae eaters so they don't starve!

I'd recommend this for anyone who's serious about controlling their Phosphate levels.

Worked on my algea problemBy lwillis22on 5/14/2013

This was recommended for my algae problem and I was sick of trying different things and them not working. This is pricy but you get what you pay for, works great!

AwesomeBy Jaredon 5/12/2013

Jared would recommend this product to a friend

Awesome product. Works great. Will continue to buy. Highly recommended.

Great StuffBy Bobon 5/12/2013

Bob would recommend this product to a friend

This is the only way I can keep algae in check

Great StuffBy Bobon 5/12/2013

Bob would recommend this product to a friend

This is the only way I can keep algae under control

the bestBy Shaunon 5/6/2013

Shaun would recommend this product to a friend

The best gfo by far. Worth the extra money from tge regular gfo to the high capacity

Works just as they said it woudBy Bill Kon 4/19/2013

Bill K would recommend this product to a friend

Just added GFO in my new BRS dual reactor .Works just as they said it woud .Great product and great veideo to help set up with the tubling of GFO.

Great stuffBy Davidon 4/13/2013

David would recommend this product to a friend

I have used both regular and HC GFO. I went with the cheaper regular last time and have regretted it. I highly recommend this product it lasts longer and requires less product to sufficiently do the job.

As good as the quality gets and great price for itBy tyvekon 4/11/2013

tyvek would recommend this product to a friend

Very good quality and the price is very good too.

Helped remove all the hair aglae in my tankBy Justinon 4/1/2013

Justin would recommend this product to a friend

I have used this twice on an off over a number of years, I had a pretty bad hair algae issue and I tried everything, after months of extracting and using phosphate removal stuff, I couldn't get rid of the algae. After adding this back in it took a little while, though no more algae.

I still get the green hue on the glass, though it takes longer now before it appears.

Awesome ProductBy Tobyon 3/26/2013

Toby would recommend this product to a friend

I am using a brand new 6 stage BRS RO/DI unit with 150gpd upgrade and booster pump. Yet, I still get a light brown/green haze on the glass daily. I only feed frozen Mysid and Frozen Formula 1 every other day making sure not to over feed. With the exception of shrimp to the BT Anenome and and DT's to the corals. No hair algae or anything bad but that dang haze. Well Folks! No More! I added BRS High capacity GFO (by BRS Calculator) in the BRS GFO reactor and it was cleared by the next day! Actually it's been 3 days and I just went over the glass and really still didn't need it. Awesome Stuff! I only regret not adding this day 1.

Essential part of process to eliminate algaeBy Darcyon 3/7/2013

Darcy would recommend this product to a friend

I don't know why I didn't use this stuff sooner. Algae was growing faster than we could remove it. Instead of enjoying our reef tank it was becoming a burden. My phosphates were always on the high side but changing our feeding practices and adding cheato to the sump never seemed to substantially change the high readings.

I set up a reactor and added High Capacity GFO from BRS. The phosphate readings dropped markedly but the algae stuck around. It was less prolific and pale looking but it was still there. So, on the advice of a fellow reefer, we obtained a sea hare and let it go to work. After 3 weeks virtually all my algae was gone. We added a fresh batch of GFO to the reactor my readings stayed where I want them at about .04 and there's no resurgence of algae. It's been over 6 weeks with no trace algae and my corals have more color to them. Hopefully, we have this licked.

When I consider all the work we went through prior to this I don't know why we dragged our feet implementing GFO to our system. BTW, no sea hare was harmed in the removal of the algae. Once there was no more algae to consume our LFS gladly gave us store credit for the returned sea hare.

Awesome By ROB Bon 2/27/2013

ROB B would recommend this product to a friend

I strongly recommend this product!!! And i strongly recommend BRS they have excellent customer service!!

AWESOME!!By Nathanon 2/21/2013

Nathan would recommend this product to a friend

Use this in a BRS Reactor and it works perfect, i use less than the amount needed and it still keeps my phosphates down

Another great BRS product.By JABlacheron 2/3/2013

JABlacher would recommend this product to a friend

Need to get your phosphates back in check? This is definitely a fix then. The key to using this GFO is to be regular in changing it and the correct flow through your reactor. A light wave in the surface of the media and changing it out after about 2 weeks works wonders for my tank. Thanks BRS for another great media!

Good but not perfectBy Johnon 12/7/2012

John wouldn't recommend this product to a friend

Like most reefers, I use BRS because it's the best when it comes to a whole slew of aquarium parts/additives/equipment. The prices are right, the products are great, blah blah blah.

But I was/have been a little disappointed by this Ferric Oxide - High Capacity. The reasons being two fold...I think that there is a lot more dust and residue in the batch than can be rinsed out with a reasonable amount of water. The result is that your reef is cloudy for a day or two, and the skimmer pulls out what I'd consider to be A LOT of ferric oxide from the water column over the next 2-3 days. Some of you might be thinking "turn down the flow in the reaction chamber", but enough flow to make the ferric oxide tumble is enough to make the tank cloudy with the stuff (even after rinsing).

My second gripe with the product is that it forms itself into a solid block inside the reaction chamber that is really tough to remove. And the flow is not too low either because as I see flow going down I increase the power of the MJ 1200 with a valve and the stuff still forms a brick in the reactor.

Granted, like most things, it's cheaper to get it on BRS than say getting rowaphos, but I like this product better for my tank.

Still I gave 3 stars because it kept phosphates at 0, just the other two factors matter a lot to me. I know for a fact that it's not good for clams to filter ferric oxide out of the water. I almost lost a deresa clam because I didn't rinse my rowaphos once.

Much better than regular GFOBy Aronon 11/29/2012

Aron would recommend this product to a friend

This is a much cleaner, longer lasting GFO than the other standard one that BRS offers. Yes it is more expensive but you get a lot more lifetime out of it and I think there is less tumbling that grinds the GFO particles into smaller pieces and eventually dust. Also out of the box after filing up the reactor there is less dirty water coming out of the reactor which is a plus.

new to productBy Josephon 10/27/2012

Joseph would recommend this product to a friend

I just started using this product. Easy to add to BRS reactor. Flushes quickly and doesn't have much fines.

Will review again after further use.

Great StuffBy Calvin Martin - Chicagoon 10/26/2012

Calvin Martin - Chicago would recommend this product to a friend

Although a bit pricy, the High Capacity GFO really does out perform any other Phosphate removal media i have used.

High Capacity Rocks!By Mikeon 10/21/2012

Mike would recommend this product to a friend

The high capacity GFO is simply the best. Must less fines and easily flows in the reactor. Nice Phosphate drop as well.

Works GreatBy Johnon 10/14/2012

John would recommend this product to a friend

This product works great and has helped reduce the problems i had with water quality. I like that BRS has videos to help make the purchasing decision easier.

Pricey but goodBy Kwadwoon 10/8/2012

Kwadwo would recommend this product to a friend

This product is little pricey but its great for the tank if you are trying to keep those phosphates in check.

Algae goneBy Scotton 10/4/2012

Scott would recommend this product to a friend

This stuff will completely wipe out your algae problems. I have cut back on the recommended amounts just to give my snails something to do. Ha.

Great stuff!By Jeremyon 10/3/2012

Jeremy would recommend this product to a friend

High capacity gfo is great. You may pay more but you use less and it doesnt take long to rinse either.

must haveBy Baoon 10/2/2012

Bao would recommend this product to a friend

I strongly recommend this product if you need the best performance. It's working great, my tank looks much clean now.

HC GFOBy jbonezon 9/29/2012

jbonez would recommend this product to a friend

this hc gfo works like a charm well worth the $$$$ yeah buddy

Very cleanBy Edwardon 9/28/2012

Edward would recommend this product to a friend

My first impression of this stuff was that it didn't take very long to clean out the "dust" or whatever it is. I put it in my BRS reactor without sponges and ran water through it into my bucket. In the past, this has taken a few gallons to run clear. I think it was about a gallon with the HC GFO. It seems to be doing its job too.

Good ProductBy Devlonon 9/11/2012

Devlon would recommend this product to a friend

This product has been a great help in my fight against algae. I saw a marked difference in the amount of algae after starting GFO.

Two thumbs up By Shaneon 9/8/2012

Shane would recommend this product to a friend

Switched from using Phos ban like this alot more will def be used at all times in my system

GFOBy Keithon 9/7/2012

Keith would recommend this product to a friend

This stuff works but with a outbreak of green hair algae and my rock leaching phosphate it depleted it far faster then I thought it would. My phosphate is 0 now thanks to this GFO but it was very costly, I would recommend normal outpt GFO if your phosphate is high like mine was, as it will still deplete quickly, just cost less in normal capacity.

Works great.By TYRUSon 9/2/2012

TYRUS would recommend this product to a friend

This GFO is excellent. No complaints

Works great.By TYRUSon 9/2/2012

TYRUS would recommend this product to a friend

This GFO is excellent. No complaints

First Line of Defense Against the Dreaded Cyano Scourge By Chrison 9/2/2012

Chris would recommend this product to a friend

I had noticed a minor outbreak of cyano in my tank a month before ordering the high capacity GFO. Even though a phosphate check from a salifert kit said there was no detectable phosphates I went ahead and installed the high capacity GFO in a BRS reactor because ammonia, nitrite and nitrate were all 0 during the cyano outbreak. Within 48 hours of the high capacity GFO on the system there was a real notable difference. The cyano was still there but instead of that classic red, thick and slimy looking appearance, it changed to a dull grey, transparent, and fragile characteristic. It really looked like it was starved to death. Too early to say what its doing to keep algae in check, but this is definitely a must for anyone with any cyano related issues.

Great productBy kevinon 8/29/2012

kevin would recommend this product to a friend

Great product, is a little more expensive but well worth it in the end. would recommend this to anyone trying to keep control of phosphates.

Best GFO out thereBy Chrison 8/28/2012

Chris would recommend this product to a friend

I've tried several brands of GFO and this is by far the best yet, produces no fines at all when tumbled at the correct rate and has lasted twice as long as the regular GFO so far with no need to change media out yet.

Great stuffBy kennyon 8/25/2012

kenny would recommend this product to a friend

Running this High Capacity in my dual BRS reactor and it keeps my Phosphate near or at zero. Me and my corals love it.....I have no nuisance algae and my tank looks great!

Best GFOBy Mikeon 8/21/2012

Mike would recommend this product to a friend

Go with the High Capacity, less dust and lasts long. Great product.

WowBy brandonon 8/14/2012

brandon would recommend this product to a friend

This GFO cleans up good, Between this and R.O.X. my numbers dropped to 0 all across the board. LFS actually said my water was too clean. Dont take that as a bad thing, just had to cut back a bit and get used to using a superior product. It may cost a bit more but it last LONGER as it is WAY MORE efficient! Cant beat it.

Works better than what I've been usingBy Davidon 8/11/2012

David would recommend this product to a friend

Ive been buying my GFO from my local aquarium store but the quality was not nearly as good as the BRS HC. The stuff I used to buy had very small fines that would end up in my refugium. BRS HC has the perfect size grains and after a quick rinsing they don't end up anywhere but where there suppose to be, in the reactor plus I don't have to use as much. I highly recommend the BRS HC feric oxide and will continue to use it as long as I have a reef aquarium

Captain Dave Egan
Sarasota Florida

PS my phosphates read 0.03

A must for any reefBy Brendanon 8/10/2012

Brendan would recommend this product to a friend

I run this in two deluxe reactors. Works great. No complaints.

AWESOME!!By wallaceon 8/4/2012

wallace would recommend this product to a friend

You can not beat this product. Perfect for rmoving phosphates!!

Never switch By Big Countryon 8/2/2012

Big Country would recommend this product to a friend

Tried every other phosphate remover out there and this is the best. Dropped Phosphates with in a week. Recommend this product to anyone!

Awesome productBy Williamon 8/1/2012

William would recommend this product to a friend

Best GFO on the market IMO. Have it running in a filter bag in my AquaClear 110 HOB power filter. It's working wonders.

Too early to tellBy Colinon 7/25/2012

Colin would recommend this product to a friend

Got the GFO high capacity about 2 or 3 months ago seems to have made a decent dent in algae growth. I also cut my light cycle down by a couple hours so I don't know if that helped. I also have read that it takes several months to really start working. Overall satisfied with the product

Much easier to work with than regular capacityBy Joshuaon 7/24/2012

Joshua would recommend this product to a friend

In my experience, the high capacity GFO produced far fewer fines than the regular capacity. I use less and less each time, and am down to a tablespoon on my 20 long, which is good for 3+ weeks feeding 1/4 - 1/3 cube of frozen per day. From what I've read, it also holds up to regeneration better since it is much more dense. I've yet to regenerate any of my GFO yet since I use so little, so I can't speak from experience.

looking goodBy Micahon 6/19/2012

Micah would recommend this product to a friend

so far so good I got it tumbling in a dual brs reactor next to rox carbon on a 72 bowfront its been about a week now so I am not going to rate preformance a five yet but like I said so far so good... I will try to remember to post another review in about a month..

highly recomendBy Jeremyon 5/15/2012

Jeremy would recommend this product to a friend

Workz great with the brs gfo reactor in less than 5 days my phosphates are 0. Over priced but I guess you pay for quality.